im not saying that dont use all the lights u have, but from what ive heard your set up dosent sound that safe and running three high power bulbs in a sketchy room is not safe. i am also getting at the plants needs as to why the hps are useless in this stage of the grow. i should have explained more. in the vegatative state a plant will respond more to the blue spectrum of lights then red. a MH is primarly blue, and the hps's are more red and orange. there fore i was sayin just use the mh for the vegative cycle and then use the hps later when u switch to 12/12 for better bud growth. and if your set up isnt safe running 2500 watts at once is not good practice for two reasons. the sketcher your set up or more cord you run through the more power u draw. I think its like every 10 feet or chord is 100 watts added i may be wrong on the mesurement but it is true, so u have more risk of melting circut breakers and burning your house down. and two if your temps are spiking so high and uncontrolably then the room u have them in is obviously not suiteable for two hps and one mh to run at the same time. but im sure u could use the hps at once with mad fans. just a suggestion.